Method for securing friction facing members



J A. BLUHM 1,789,133

METHOD FOR SECURING FRICTIONFACING MEIBERS Filed Dec. 11, 1928 Fig.4

v Fi 5 4 106 2 11 E 10 2 '5 \"W" 'v 3 l" lNveN TdlQ VWMQ ZZVA ##75 their supports by 15 port, and is further limitedlo the substances having'this a hesion do not .side of a metallic suppo .1 synthetic metallic members may be m 4 method adapted for factory other two methods Fig; 1' is a Patented 13, 193 1 AUNITEDY STATE PATENT e ee nnxannan BLUHH, or rams, raancn, 'ASSIGNOB 'ro socmrn ANONYKE ramcnsa no raaono, or rams, .rRANcr:

unrnon son sncuame FRICTION moms Kansans Application filed December 11, 1928,8eria1 No. 825,259,-

Friction members employed for brakes, clutches and the like are usually secured to metallic rivets-0r by an autogenous cementing of the friction substances.

It is found inconvenient to secure the facing by metallic rivets, 'since after a certain wear, the said rivets will make contact with the drum, and this will be scratched, also causing noise. j

The mounting of the facing pieces byautogenous cementing is limited to the use of substances in which the agglomerating material can adhere to the metal of the supthe fact that as a rule possess the desired friction qualitiea. According to the present invention, the parts are secured in a manner which does not offer the defects inherent in the metallic riveting nor in autogenous cementin by the use of rivets orpegs consisting of a difierent nature from the friction sub- 35 stance, or which will' not form a unit comtherewith, and are adapted for polymerization, and sume a sufiicient mechanical strength low the facing to be secured to its support.

If it is desired to mount a facing on each rt, there are used bination hardening "by rivets consisting of two pieces with tapered heads, which make contact with the two respective .fa'cings which pieces can be firmly securedto er.

The substances used, for said pegs may comprise asbestos fibres impregnated with resins or of agglomerated material of any suitable shape, in which adequate b d d The accom anying dra showsb way onexample t forms of 'ction acing meinbers according to the invention in which the first form relates to a securing use, and; the be used The drawings also ow twoconstructions relating to friction facing members disposed on either sectional view of-af facing memof st. stances asto al- "ness, said sheet being then sec brake shoe by;rivets or screwsw merized in all cases;

3, and thus prevents side of a commonmetallic support.

and in. mm October 13, 1M8.

ing to two other formsof construction.

' 4 is a' sectional view of the first form,

concerning double facings, and Figure 5 is a like view relating to the second form. Beferrmg to Figure 1, the friction members are" secured by the pins or pegs 1 which may consist of asbestos fibre which are braided and are impregnated with nthetic rosin,'the whole beingmade suficient y dense and rigid by .cold pressing orlike means. Such pins or pegs are cut to the pro r length and are driven into holes forme for the purpose in'the facing substance 2 and the support 3. Their length is such that during the operation ofpolymerizing under pressure, the pin or peg will form a head which fills up the countersunk part of the hole in the facing, and will alsoform a rivet head at the other end, to be placed on the opposite side of'the support.

For this purpose, the whole is pressed in the hot state, and this first'softens the piece and'permits the formation ofv the heads and the said rivet ends on the various'pegs, and then polymeriies these latter in order to give them the properhardness. v n

It is thus feasible to mount any suitable faci members upon a removable support of sheet iron or other metal of the proper thickno wise make contact with the i'netallic drum or other friction part.

With reference to 2 and 3, the construction. comprises rivets of a material analogous to t e preceding, whichare polyafter a suitable me her, which is adapted to'be secured to the support, has been imbedded intheir mass.

In the example shown in I 4 is given a form allowing its insertion into a corresponding hole in the facin piece. A

shoulder 5 of the said rivet ma es contact with the outer part of the metallic support it. from sliding under the pressure of the drum.

"In the narrow part is imbedded a split rod Y Fig. 2, the rivet 'ch can in f split rod 6 is in the friction 'pletely worn down,

,core 3 is provided on 6 whose branches support. The imbedded an the shoulder,

even when the facing piece is comthe friction member will and thus not be scratched. Fig. .3 showsan analogous device. The

which is imbedded in the mass, it bein threaded to receive a screw 8 whose makes contact with the outer face of port. Since the material in use possesses suftive' friction facing said members are secured by the plastic rivtallic core which is pierced The said rivets consist of two tapered parts i desired variations without dep disposed-thereon, and" 2. a friction fac et l PM t e in. b lthe' sideof the a plastic membe ets'4', analogous to the preceding, to the mewith the hole 9.

4"4 which may be into thehole 9 and gether by adevice s sure buttons. e

As shown in Fig. 4, themale and female parts 10 and lO of the said button device more or'less inserted may .be connected toch as is used for presaresecured to the corresponding parts 4 4 of the rivet when the same is manufactured,

or otherwise; In the device shown in Fig; 5, the button hole slot 10 is eliminated, and the button 10' is engaged directly said' plastic substance. A

he securing device is susceptible offr all in a 11 the the principle of the invention. For

number, assemb and nature of the securingparts in use, z'nthout departing from the principle of the Claims:

L'In'afriction faci ametall-ic n8,

invention. I

v be combination of support, a friction f M e e r traversing the saidiimemberlnd su rt, a. rm

fici'ent' ofiriction, "e w rs imposition tend which is incontact ui i h u support, v. H don'thesaidsu rt,

madefof hardened through thesaid facing and the t can be bent down upon the I outer face ofthe part extends no further th replaced by a metallic socket 7' 4 a metallic support, a friction facing member on both sides ofthe said support, securing members themselves.

, instance it is obviously feasible to modify the form,

member cwuht'ahee 5: havlnga high coelicient-o extendmamas surface of the metallic support on side the combination of of the facing member.

3. In a friction facing, a metallic support a friction facing member disposed on the said'su port, securing. rivets made of hardened ic substance having a high coefliciento friction, extend ing through the said facin member and the said support, the said rivets havin a re- 4 duced part on the side ofthe meta c support, a screw threaded metallic socket inserted into the substance of the rivets on the side of the metallic support, a screw with a flat head intreduced in the said socket and whose flat head bears against the,external face of the sup rt, the said socket not ex-' tending outwar 1y of the surface of the me-; tallic su port on the side of the friction facing'mem r.

4. In a friction facing,

the rivets on 'the side of the metallic suppgrt, being nt the combination of rivets made of hardened pastic substance haying a high coeflioient otfriction, extend ing through every one of the said facing members and the said support, the said rivets having 'a'reduced part on the side of the support, male cou lingmembers on the rivets of one of the. facing members, female coupling members on the rivets ofthe other facing member and adapted to be fixed to the male hereof I have In testimony my s gnature...

ich are adaptedfto w r f tid, and do {not vten-1 outwardly of the surfa'ce'of. the .2

are- 

